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Evidence of dmisteinbergite (hexagonal form of CaAl2Si2O8) in pseudotachylyte: A tool to constrain the thermal history of a seismic event

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Published/Copyright: April 2, 2015
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American Mineralogist
From the journal American Mineralogist Volume 95 Issue 2-3

Abstract

The determination of the maximum temperature achieved by friction melt (Tmelt) in pseudotachylytebearing faults is crucial to estimate earthquake source parameters (e.g., earthquake energy budgets, coseismic fault strength) on a geological basis. Here we investigated the mineralogy of a pseudotachylyte from the Gole Larghe Fault (Italian Alps) by using X-ray powder diffraction, micro-Raman spectroscopy, and EDS-equipped field emission scanning electron microscopy. In particular, we report the presence of the hexagonal polymorph of CaAl2Si2O8 (dmisteinbergite) in a pseudotachylyte. Published experimental work shows dmisteinbergite can crystallize at 1200-1400 °C by rapid quenching. Therefore, the presence of dmisteinbergite in pseudotachylyte could be a reliable geothermometer for friction melts for which Tmelt has only as yet been estimated.

Keywords: Pseudotachylyte; earthquake; dmisteinbergite; geothermometer
Received: 2009-9-3
Accepted: 2009-10-20
Published Online: 2015-4-2
Published in Print: 2010-2-1

© 2015 by Walter de Gruyter Berlin/Boston

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  1. Brownleeite: A new manganese silicide mineral in an interplanetary dust particle
  2. Simulation of thermodynamic mixing properties of actinide-containing zircon solid solutions
  3. Multilevel modular mesocrystalline organization in red coral
  4. High-pressure behavior of 2M1 muscovite
  5. Chopinite-sarcopside solid solution, [(Mg,Fe)3□](PO4)2, in GRA95209, a transitional acapulcoite: Implications for phosphate genesis in meteorites
  6. Distribution of rare earth elements in lunar zircon
  7. Methodological re-evaluation of the electrical conductivity of silicate melts
  8. Site-specific infrared O-H absorption coefficients for water substitution into olivine
  9. High-pressure phase transition of a natural pigeonite
  10. Location and quantification of hydroxyl in wadsleyite: New insights
  11. Optical spectroscopic study of natural Fe-rich Pizzo Forno staurolite at different temperatures and pressures
  12. Metasideronatrite: Crystal structure and its relation with sideronatrite
  13. Optical absorption, luminescence, and electron paramagnetic resonance (EPR) spectroscopy of crystalline to metamict zircon: Evidence for formation of uranyl, manganese, and other optically active centers
  14. Factors responsible for crystal-chemical variations in the solid solutions from illite to aluminoceladonite and from glauconite to celadonite
  15. REE diffusion in olivine
  16. Phase transition induced by solid solution: The BCa-BMg substitution in richteritic amphiboles
  17. Aiolosite, Na2(Na2Bi)(SO4)3Cl, a new sulfate isotypic to apatite from La Fossa Crater, Vulcano, Aeolian Islands, Italy
  18. Gayite, a new dufrénite-group mineral from the Gigante granitic pegmatite, Córdoba province, Argentina
  19. Galliskiite, Ca4Al2(PO4)2F8·5H2O, a new mineral from the Gigante granitic pegmatite, Córdoba province, Argentina
  20. Description and crystal structure of liversidgeite, Zn6(PO4)4·7H2O, a new mineral from Broken Hill, New South Wales, Australia
  21. Evidence of dmisteinbergite (hexagonal form of CaAl2Si2O8) in pseudotachylyte: A tool to constrain the thermal history of a seismic event
  22. Partitioning of Eu between augite and a highly spiked martian basalt composition as a function of oxygen fugacity (IW-1 to QFM): Determination of Eu2+/Eu3+ ratios by XANES
  23. Density functional calculation of the infrared spectrum of surface hydroxyl groups on goethite (α-FeOOH)
  24. X-ray diffraction and Mössbauer spectroscopy of Fe3+-bearing Mg-silicate post-perovskite at 128–138 GPa
https://doi.org/10.2138/am.2010.3393
Keywords for this article
Pseudotachylyte; earthquake; dmisteinbergite; geothermometer

Articles in the same Issue

  1. Brownleeite: A new manganese silicide mineral in an interplanetary dust particle
  2. Simulation of thermodynamic mixing properties of actinide-containing zircon solid solutions
  3. Multilevel modular mesocrystalline organization in red coral
  4. High-pressure behavior of 2M1 muscovite
  5. Chopinite-sarcopside solid solution, [(Mg,Fe)3□](PO4)2, in GRA95209, a transitional acapulcoite: Implications for phosphate genesis in meteorites
  6. Distribution of rare earth elements in lunar zircon
  7. Methodological re-evaluation of the electrical conductivity of silicate melts
  8. Site-specific infrared O-H absorption coefficients for water substitution into olivine
  9. High-pressure phase transition of a natural pigeonite
  10. Location and quantification of hydroxyl in wadsleyite: New insights
  11. Optical spectroscopic study of natural Fe-rich Pizzo Forno staurolite at different temperatures and pressures
  12. Metasideronatrite: Crystal structure and its relation with sideronatrite
  13. Optical absorption, luminescence, and electron paramagnetic resonance (EPR) spectroscopy of crystalline to metamict zircon: Evidence for formation of uranyl, manganese, and other optically active centers
  14. Factors responsible for crystal-chemical variations in the solid solutions from illite to aluminoceladonite and from glauconite to celadonite
  15. REE diffusion in olivine
  16. Phase transition induced by solid solution: The BCa-BMg substitution in richteritic amphiboles
  17. Aiolosite, Na2(Na2Bi)(SO4)3Cl, a new sulfate isotypic to apatite from La Fossa Crater, Vulcano, Aeolian Islands, Italy
  18. Gayite, a new dufrénite-group mineral from the Gigante granitic pegmatite, Córdoba province, Argentina
  19. Galliskiite, Ca4Al2(PO4)2F8·5H2O, a new mineral from the Gigante granitic pegmatite, Córdoba province, Argentina
  20. Description and crystal structure of liversidgeite, Zn6(PO4)4·7H2O, a new mineral from Broken Hill, New South Wales, Australia
  21. Evidence of dmisteinbergite (hexagonal form of CaAl2Si2O8) in pseudotachylyte: A tool to constrain the thermal history of a seismic event
  22. Partitioning of Eu between augite and a highly spiked martian basalt composition as a function of oxygen fugacity (IW-1 to QFM): Determination of Eu2+/Eu3+ ratios by XANES
  23. Density functional calculation of the infrared spectrum of surface hydroxyl groups on goethite (α-FeOOH)
  24. X-ray diffraction and Mössbauer spectroscopy of Fe3+-bearing Mg-silicate post-perovskite at 128–138 GPa
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